public Object get(String name)
Returns the value of the named attribute as an Object,
or null if no attribute of the given name exists.

 public Object getAttribute(String name)
Returns the value of the named attribute as an Object,
or null if no attribute of the given name exists.

 public Enumeration getAttributeNames()
Returns an Enumeration containing the
names of the attributes available to this request.
This method returns an empty Enumeration
if the request has no attributes available to it.

 public String getAuthType()
Returns the name of the authentication scheme used to protect
the servlet, for example, "BASIC" or "SSL," or null if the servlet was
not protected

 public String getCharacterEncoding()
Returns the name of the character encoding used in the body of this
request. This method returns null if the request
does not specify a character encoding

 public int getContentLength()
Returns the length, in bytes, of the request body

 public String getContentType()
Returns the MIME type of the body of the request

 public String getContextPath()
Returns the portion of the request URI that indicates the context
of the request. The context path always comes first in a request
URI. The path starts with a "/" character but does not end with a "/"
character. For servlets in the default (root) context, this method
returns "".

 public Map getCookieMap()
Returns a map of the Cookie objects the client sent
with this request, indexed by name. This method returns an empty
map if no cookies were sent.

 public Cookie[] getCookies()
Returns an array containing all of the Cookie
objects the client sent with this request.
This method returns null if no cookies were sent.

 public long getDateHeader(String name)
Returns the value of the specified request header
as a long value that represents a
Date object. Use this method with
headers that contain dates, such as
If-Modified-Since.

The date is returned as
the number of milliseconds since January 1, 1970 GMT.
The header name is case insensitive.

If the request did not have a header of the
specified name, this method returns -1. If the header
can't be converted to a date, the method throws
an IllegalArgumentException.

 public String getHeader(String name)
Returns the value of the specified request header
as a String. If the request did not include a header
of the specified name, this method returns null.
The header name is case insensitive. You can use
this method with any request header.

 public Enumeration getHeaderNames()
Returns an enumeration of all the header names
this request contains. If the request has no
headers, this method returns an empty enumeration.

Some servlet containers do not allow do not allow
servlets to access headers using this method, in
which case this method returns null

 public Enumeration getHeaders(String name)
Returns all the values of the specified request header
as an Enumeration of String objects.

Some headers, such as Accept-Language can be sent
by clients as several headers each with a different value rather than
sending the header as a comma separated list.

If the request did not include any headers
of the specified name, this method returns an empty
Enumeration.
The header name is case insensitive. You can use
this method with any request header.

 public Locale getLocale()
Returns the preferred Locale that the client will
accept content in, based on the Accept-Language header.
If the client request doesn't provide an Accept-Language header,
this method returns the default locale for the server.

 public Enumeration getLocales()
Returns an Enumeration of Locale objects
indicating, in decreasing order starting with the preferred locale, the
locales that are acceptable to the client based on the Accept-Language
header.
If the client request doesn't provide an Accept-Language header,
this method returns an Enumeration containing one
Locale, the default locale for the server.

 public String getMethod()
Returns the name of the HTTP method with which this
request was made, for example, GET, POST, or PUT.
Same as the value of the CGI variable REQUEST_METHOD.

 public String getParameter(String name)
Returns the value of a request parameter as a String,

 public Enumeration getParameterNames()
Returns an Enumeration of String
objects containing the names of the parameters contained
in this request. If the request has
no parameters, the method returns an
empty Enumeration.

 public String[] getParameterValues(String name)
Returns an array of String objects containing
all of the values the given request parameter has, or
null if the parameter does not exist.

If the parameter has a single value, the array has a length
of 1.

 public String getPathInfo()
Returns any extra path information associated with
the URL the client sent when it made this request.
The extra path information follows the servlet path
but precedes the query string.
This method returns null if there
was no extra path information.

Same as the value of the CGI variable PATH_INFO.

 public String getPathTranslated()
Returns any extra path information after the servlet name
but before the query string, and translates it to a real
path. Same as the value of the CGI variable PATH_TRANSLATED.

If the URL does not have any extra path information,
this method returns null.

 public String getProtocol()
Returns the name and version of the protocol the request uses
in the form protocol/majorVersion.minorVersion, for
example, HTTP/1.1. For HTTP servlets, the value
returned is the same as the value of the CGI variable
SERVER_PROTOCOL.

 public String getQueryString()
Returns the query string that is contained in the request
URL after the path. This method returns null
if the URL does not have a query string. Same as the value
of the CGI variable QUERY_STRING.

 public String getRemoteAddr()
Returns the Internet Protocol (IP) address of the client
that sent the request. For HTTP servlets, same as the value of the
CGI variable REMOTE_ADDR.

 public String getRemoteHost()
Returns the fully qualified name of the client that sent the
request, or the IP address of the client if the name cannot be
determined. For HTTP servlets, same as the value of the CGI variable
REMOTE_HOST.

 public String getRemoteUser()
Returns the login of the user making this request, if the
user has been authenticated, or null if the user
has not been authenticated.
Whether the user name is sent with each subsequent request
depends on the browser and type of authentication. Same as the
value of the CGI variable REMOTE_USER.

 public String getRequestURI()
Returns the part of this request's URL from the protocol
name up to the query string in the first line of the HTTP request.
For example:



First line of HTTP request

Returned Value
POST /some/path.html HTTP/1.1
/some/path.html
GET http://foo.bar/a.html HTTP/1.0
http://foo.bar/a.html
HEAD /xyz?a=b HTTP/1.1
/xyz

 public String getRequestedSessionId()
Returns the session ID specified by the client. This may
not be the same as the ID of the actual session in use.
For example, if the request specified an old (expired)
session ID and the server has started a new session, this
method gets a new session with a new ID. If the request
did not specify a session ID, this method returns
null.

 public String getScheme()
Returns the name of the scheme used to make this request,
for example,
http, https, or ftp.
Different schemes have different rules for constructing URLs,
as noted in RFC 1738.

 public String getServerName()
Returns the host name of the server that received the request.
For HTTP servlets, same as the value of the CGI variable
SERVER_NAME.

 public int getServerPort()
Returns the port number on which this request was received.
For HTTP servlets, same as the value of the CGI variable
SERVER_PORT.

 public String getServletPath()
Returns the part of this request's URL that calls
the servlet. This includes either the servlet name or
a path to the servlet, but does not include any extra
path information or a query string. Same as the value
of the CGI variable SCRIPT_NAME.

 public Session getSession()
Returns the current session associated with this request,
or if the request does not have a session, creates one.

 public Session getSession(boolean create)
Returns the current Session
associated with this request or, if if there is no
current session and create is true, returns
a new session.

If create is false
and the request has no valid Session,
this method returns null.

To make sure the session is properly maintained,
you must call this method before
the response is committed.

 public String getSitemapURI()

Returns the URI of the requested resource as interpreted by the sitemap.
For example, if your webapp is mounted at "/webapp" and the HTTP request
is for "/webapp/foo", this method returns "foo". Consequently, if the
request is for "/webapp", this method returns an empty string.


Note that if the request is mapped to a pipeline that contains
aggregated content, and if this method is called in the context of
one of the aggregated parts (e.g. a server page), this method will
return the URI of the aggregated part, not the original requested URI.

 public String getSitemapURIPrefix()

Returns the URI Prefix of the requested resource where the sitemap is mounted.
For example, if your webapp is mounted at "/webapp" and the HTTP request
is for "/webapp/foo", this method returns "webapp/".

 public Principal getUserPrincipal()
Returns the login of the user making this request, if the
user has been authenticated, or null if the user
has not been authenticated.
Whether the user name is sent with each subsequent request
depends on the browser and type of authentication. Same as the
value of the CGI variable REMOTE_USER.

 public boolean isRequestedSessionIdFromCookie()
Checks whether the requested session ID came in as a cookie.

 public boolean isRequestedSessionIdFromURL()
Checks whether the requested session ID came in as part of the
request URL.

 public boolean isRequestedSessionIdValid()
Checks whether the requested session ID is still valid.

 public boolean isSecure()
Returns a boolean indicating whether this request was made using a
secure channel, such as HTTPS.

 public boolean isUserInRole(String role)
Checks whether the currently logged in user is in a specified role.

 public  void removeAttribute(String name)
Removes an attribute from this request. This method is not
generally needed as attributes only persist as long as the request
is being handled.

Attribute names should follow the same conventions as
package names. Names beginning with java.*,
javax.*, and com.sun.*, are
reserved for use by Sun Microsystems.

 public  void setAttribute(String name,
    Object o)
Stores an attribute in this request.
Attributes are reset between requests.

Attribute names should follow the same conventions as
package names. Names beginning with java.*,
javax.*, and com.sun.*, are
reserved for use by Sun Microsystems.

 public  void setCharacterEncoding(String enc) throws UnsupportedEncodingException
Overrides the charactor encoding of parameters.